Eccentricless valve-gear for steam-engines.



G. -W.VCH1TW00D L R. 1. PQPLIN.

EGGENTRCLESS VALVE GEAR FOB. STEAM ENGINES.

APPLIOATIQN PILD DBO. 234.1912.

Patented. Apr. 8, 1913.

2 SHEETS-SHEET l.

G. W. GHITWGQD @I R, T. PGPLm. YEGCETRICLBSS VALVE GEAR FOR STEAMENGINES.

I APPLICATION I'ILED DEC. 23, 1912.

1,058,152. Patent@dApr.8,1913.

2 SHEETS-SHEET 2.

To all it concern."

it known that-we,y GEoneE Woon and RonaTT: P orniN, citizens oftheUnited States, .residing at.Butt er.-ie1d','ii i the' 'sraras Para 'fesoneri .wg nomini 5r. sorting.oraiiiriiaintm'alrssoum. i -ziiccnmcrmss'verve-.citation sanear-ammini i county of- Ba'rry" and State dfMissouri, have invented certain new and useful Improvements in 7 Ecr:eIit-ricless.4 Valve- Gear for Steam-Engines, -ofwhich .the following is aspecification, ref erencebeipg hadto y the aq.'

This invention relates toj'ai'i' eccentricless valve gear-for steamengines and has for its primary .object to provide an enginevvalv'eearwherein the. u'seofthelus'u'al eccentric is. ispensed with, thus greatlyreducing-'the weight of the gearand permitting ofthe easy andquickactuation of 'the 'reversing elements thereof. l

A further objectof 'the invention resides in the provision of a valvegear of the' above character which. iseittrem'elyl simple iny its Aaoconstruction', has few joints`,'thus rendering'- the same'very elic-intand durable 'inv-opi be manufactured aty Another object ofthe. inventionis generally improve and' simplifyvalve gears for -steam engines vandto. produce a geai` which is' primarily designed'foruse upon locomotiveengines, though it will become apparent' from the following' descriptionthat with slight modifications, the invention. may also .be renderedvapplicable to the4 various types of stationary engines.

lV'tli the above and other objects in view as will become apparent asthe 'description proceeds, the invention consists in' certain'constructions, combinations and arran e-l ments of the parts thatweshall hereina ter' fully describe and claim.

For a full understanding of the-invention,y reference is to behad' tothefollowing' de-v scription and accompanying drawings, in

which- Figure 1 is a side elevation showing'our improved valve gearapplied to use upon a lbcomotive.

ration showing the provision of the revers- Fig. 2 is'an enlarged sideeleing rod when the operation of the valve has been reversed. Fig. 3.'is a vertical section taken on the line3--3 of Fig. 2. Fig. l is adetail vertical section througlrthe guide', showing the slidingblockmounted therein .and the reversing 'rod connected to said block. Fig. 5is a 'horizontal section taken on the line 5 5 of Fig. 4, and Fig. 6 isal Sliecication-ot Letters l' A'piamuon med necember es, 1 91'2.' 4serialNo; 738,333.

connecting rod. 1-.

'latheillustrated embodiment 4lofff'u'r. .f

" Pete-leiders 8519.11.34

' p iai 'visa-f; .the guia@ s t'iida'ra ana 4..pm'.. tions of thereversing andvilve. eben! g,vention, we .havel shown. the improvedvalvef gear applied to a 'locomotive engine wherein'- l 1 indicates the.-boiler ofa locomotive of. any

- the.' other e'nd lof; said -rod being; journaled 4upon vafgudgeon 6provided upon. one 'o'f the drive wheels 2. The. cross head 5lis o'fcourse, .suitabl connectedto'the end ofpfjth'e piston rod an' movesbetween," the parallel way-'bars- 7.- .'Uponthev upper way-bar '7, 'anarcuate "vertically disposed guidestandvided,wit-h} an oblii u elyinclined brace 1 0 which is' securely. bo tedf'tofthe 4 upper wa-yf orattaching plate 9. isfintegrally formed with the standard 'and projectstransversely' from one Aside thereof, said lbrace beinga-lso. f.suitably secured to thefwaybar. .The pur, 'poseof .thisarrangementwillv-beclearl'y' dis' closed' in the following description. 12'designates the'vaIveStem' connecting stem 1'3-of'theslidin0 valvearranged in the -'steam chest .of the piston cylinder for slidingmovement 'to' control thesupply of steam to the opposite fendsof thecylinder. @This connecting -rod 12'is disposed outwardly of of isVprovided' with a sectional bearing or journal. box4 to recei'vea'wristp1n'14 searm 14. The-lower 'end of this arm is pivotall'yconnectedVltoon'e en'd o fa sub-cra n k.

ward end ofthe reversing rod 16 i's pivotal-ly connected to ayblo'ck 17which is mounted for vertical movement in the longitudinal jt-lie guidestandard '8 andthe rear end thereend to receive thewrist pin 14.. Theforbar' 7' as.A indicatedjatll." 'A second brace.-

rod, one end 'of v'which is connected to the cured orformed upon oneend` of a'rock'e'r 'ics sl'ot of the arcuate. guide standard 8. Thisblock is removably retained in position'in saidA slot by means of thecap late 18 bolted or otherwise secured' to the. lock and. ex-

tending up'on opposite sides-of the slot in the standard 8 as shown Fig.5., To theA block 17, one end of a linlr19 is pivotally connected. rlheother end of this link is similarly l connected to one larm of a bellcrank lever 201vvhich is operated through the medium of a rod or anyother preferred means extending to the-engineers cab of the locomotive.y

From reference to Fig. 2 of the drawings,

it will be seen that' the valve stem connecting rod b 1:2'inte'rsectsthe arcuate slotted guide standard 8 substantially midway between itsends, and in order to insure an equal stroke of ythe steam chestvalveboth in its forvvard `and reverse operati n, it Willbe obvious that thereversing rofl 16 at its for `Ward end must lie-moved the same distanceabove as below the rod 12. 'husavhen the rod 16' is shifted through themovement of the bell crank lever 20, 'the rocker armjla will be moved totheopposite sidel of the Wrist pin upon the upper` end of the crank pinl5 from the .position shown in Fig l.

so that the operation of the steam crest valve is reversed.- A' uniformAlength of stroke of the valve is assured in either po-` sit-ion of thereversing rod 16. i

Fromv 'the foregoing description taken in connection With theaccompanying drax'vings, it is thought that the v construction and loperation of our improved eccentricless valve gear will be readilyunderstood. Whenit is desired to reverse the operation of the engine, itYis only necessary to shift the bell crank lever 2() whereupon theforward end of the reversing rod is moved to its uppermost or lowermostposition in the slotted arcuate standard 8, as the case may be.

, Owing to the fact that the usevof Iall eccenhighly efficient Workingorder. It will also e appreciated that by eliminating the use ofeccentrlcs in devices of this character, the

i Weight of the gear is materially reduced and the same may also bemanufactured at relatively small cost.

`While We have shown and described the preferred construction andarrangement of vthe several elements employed, it 'will be understoodthat our improved valve gea-r is susceptible of a great many Vminormodificaaccedas tions which may be necessitated iniorder to adapt theinvention to the various differentv types Io'fsteam engines, and thatsuch minor alterations -as may fairly come Within the scope of the'appended claims are fully anticipated and may be resorted to in thepractical development ofour invention.

Having thus described the invent-ion, what is claimed is: f y

- l. lnan eccentricless valve gear, the comn biration ivith the enginesteamA chest valve,

of an arcuate guide member, a crank` pin carried by one of the movableparts of the lengine for travel in i circular path, a rocker arm havingone of its ends fulcrumed upon said crank pin, a rod connected to thestem of the sliding valve, a reversin rod, means for slid-ably mountingone en( of said reversing rod in the arcuate guidemembenthe other endsof said connecting rod and reversing rod'being pivotally mounted uponthe othenend of the rocker arm7 and means connected to the reversing rodadapted to Vbe manually operated to shift said reversing rod in theguide member and 'dispose said rocker arm with relation to the crank pinto reverse thevoperation ofthe steam 4chest valve. y

2. In an eccentricless valve gear for locomotives, the combination withthe steam chest valve, of a vertically disposed arcuate slotted guidemounted upon the cross head frame of the engine, a sub-crank-pin keyedupon the driving rod gudgeon of one of the driving wheelsa rockerv armfulcrumed at one of its ends upon said sub-crank pin, a

connecting rod connected at one end to the stem of the steam chest valveand pivotal'ly mounted at its other end upon the opposite 'end of saidrocker arm, ablock movably mounted in said slotted guide, a reversingrodpivotally connected to one end of said block, the other end of saidrod being pivotally mounted upon they latter end of the rocher arm, andmanually. operable means connected to said block to shift the same 4inthe guide member and l.dispose said rocker arm with relation to thesub-crank pin to reverse the operation of vthe steam chest valve. y

ln testimony .whereof We hereunto affix our signatures in the presenceof tivo witnesses.

GEURGE W. yCllllWVD.

RUBERT TqPPLllFl.

Witnesses: i

T. E. Vfinnonm- L'. R. LnrrH.

